气候变化领域集成服务门户(CCPortal): Crystal Fractionation by Crystal-Driven Convection

CCPortal

DOI	10.1029/2019GL086784
	Crystal Fractionation by Crystal-Driven Convection
	Culha C.; Suckale J.; Keller T.; Qin Z.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:4
英文摘要	Fractional crystallization is an essential process proposed to explain worldwide compositional abundances of igneous rocks. It requires crystals to precipitate from the melt and segregate from its residual melt, or experience crystal fractionation. The compositional abundances of volcanic systems show a bell curve distribution suggesting that the process has variable efficiencies. We test crystal fractionation efficiency in convective flow in low to intermediate crystallinity regime. We simulate the physical segregation of crystals from their residual melt at the scale of individual crystals, using a direct numerical method. We find that at low particle Reynolds numbers, crystals sink in clusters. The relatively rapid motion of clusters strips away residual melt. Our results show cluster settling can imprint observational signatures at the crystalline scale. The collective crystal behavior results in a crystal convection that governs the efficiency of crystal fractionation, providing a possible explanation for the bell curve distribution in volcanic systems. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Bells; Crystallinity; Efficiency; Igneous rocks; Numerical methods; Reynolds number; Volcanoes; Convective flow; Crystal behavior; Crystal fractionation; Fractional crystallization; Particle Reynolds number; Rapid motions; Residual melts; Volcanic systems; Crystals; cluster analysis; convection; crystallinity; crystallization; efficiency measurement; fractionation; Reynolds number
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170663
作者单位	Department of Geophysics, Stanford University, Stanford, CA, United States; School of Earth and Geographical Sciences, University of Glasgow, Glasgow, United Kingdom
推荐引用方式 GB/T 7714	Culha C.,Suckale J.,Keller T.,et al. Crystal Fractionation by Crystal-Driven Convection[J],2020,47(4).
APA	Culha C.,Suckale J.,Keller T.,&Qin Z..(2020).Crystal Fractionation by Crystal-Driven Convection.Geophysical Research Letters,47(4).
MLA	Culha C.,et al."Crystal Fractionation by Crystal-Driven Convection".Geophysical Research Letters 47.4(2020).